This presentation is faster for dial-in systems because detail is downloaded only when necessary.

To zoom in, click on area of interest.
or slide black triangle at bottom of image (near the "+") left & right to zoom in & out.
or use the "+" and "-" icons, or use the "+" & "-" keys to zoom in/out.

When zoomed in drag red rectangle in thumbnail image in upper left corner to view other areas of the image.

To pan left/right & up/down drag cursor in image
or use the arrow icons, or arrow keys to pan.

Press the arrow-in-circle icon to reset the image.